[R] Satellite ocean color palette?

[Tim Clark]

Thanks!  The colorRampPalette() did just what I need.

Tim


Tim Clark
Department of Zoology 
University of Hawaii


--- On Fri, 10/9/09, Barry Rowlingson <b.rowlingson at lancaster.ac.uk> wrote:

> From: Barry Rowlingson <b.rowlingson at lancaster.ac.uk>
> Subject: Re: [R] Satellite ocean color palette?
> To: "Tim Clark" <mudiver1200 at yahoo.com>
> Cc: r-help at r-project.org
> Date: Friday, October 9, 2009, 9:06 AM
> On Fri, Oct 9, 2009 at 7:51 PM, Tim
> Clark <mudiver1200 at yahoo.com>
> wrote:
> > Dear List,
> >
> > Is there a color palette avaliable similar to what is
> used in satellite ocean color imagery?  I.e. a gradient
> with blue on one end and red on the other, with yellow in
> the middle?  I have tried topo.colors(n) but that comes out
> more yellow on the end.  I am looking for something similar
> to what is found on the CoastWatch web page:
> >
> > http://oceanwatch.pifsc.noaa.gov/imagery/GA2009281_2009282_sst_2D_eddy.jpg
> >
> > Thanks!
> 
>  You could build one yourself with the colorRamp function:
> 
> satRampP =
> colorRampPalette(c("black","blue","cyan","yellow","orange","red","black"))
> 
>  that looks roughly like the one in the jpg, but I'm not
> sure about
> the black at the far end...anyway, let's see:
> 
> image(matrix(seq(0,1,len=100),100,1),col=satRampP(100))
> 
> Or you could try my colour schemes package:
> 
> https://r-forge.r-project.org/projects/colourscheme/
> 
> Barry
>